Well spotted... That is a bit confusing, but apparently intentional, since that first Troubleshooting page links to the second one! Perhaps @peternlewis could kindly clarify this.
I suspect that the first Troubleshooting page you linked to is a remnant of the time when the "Manual" and the "Wiki" were two different (but overlapping) resources.
Thanks. I guessed as much but had thought that the manual and the Wiki were the same thing these days. How do you see the "different focusses"?
By the way, Peter, the two links about the forum in the manual's Troubleshooting page should probably be brought in line with the Wiki's Troubleshooting page, by also being changed from https://forum.keyboardmaestro.com/ to https://wiki.keyboardmaestro.com/Forum. See also the reference in https://wiki.keyboardmaestro.com/manual/Assistance.
The User Manual is designed to be a single document, with a table of contents and a PDF version. You could, for the most part, read the manual from start to finish to gain knowledge of how Keyboard Maestro operates.
The wiki is more a reference for the details, the bulk of it documents the actions and the triggers, conditions and collections.